CN202174782U

CN202174782U - Back panel structure for solar battery

Info

Publication number: CN202174782U
Application number: CN 201120236970
Authority: CN
Inventors: 林志铭; 李建辉; 张孟浩
Original assignee: Asia Electronic Material Co Ltd
Current assignee: Asia Electronic Material Co Ltd
Priority date: 2011-07-07
Filing date: 2011-07-07
Publication date: 2012-03-28
Anticipated expiration: 2021-07-07

Abstract

The utility model discloses a back panel structure for a solar battery, which is provided with a core layer, a first adhesive layer, a second adhesive layer, an internal covering layer and an external covering layer, wherein the internal covering layer is adhered to the upper surface of the core layer through the first adhesive layer; the external covering layer is adhered to the lower surface of the core layer through the second adhesive layer; and both the internal and the external covering layers are composite films made of polyimide and Teflon. As the external covering layer adopts the composite film made of polyimide and Teflon to effectively block water vapor, the internal covering layer adopting the composite film made of polyimide and Teflon is arranged on the inner side and adhered to the solar battery or a solar cell module to further improve the water vapor blocking effect, and the composite films made of polyimide and Teflon has weatherability, the back panel structure provided by the utility model has excellent water vapor prevention effect and weatherability/processing durability.

Description

The solar cell backboard structure

Technical field

The utility model belongs to area of solar cell, relates generally to a kind of solar cell backboard with composite membrane of being processed by polyimides and Teflon.

Background technology

Along with the development of human civilization, the whole world faces problems such as serious energy crisis and environmental pollution.Wherein, with the photovoltaic solar cell that can solar energy directly be transformed into electric energy as solving whole world energy crisis and reducing one of important method of environmental pollution.The module that solar cell constitutes is arranged at the open air usually; Undermine solar module for fear of factors such as the aqueous vapor of outdoor environment, high temperature; Therefore aqueous vapor through corrosion circuit etc. for example, particularly requires solar cell backboard to have weatherability and the vapor transmission rate is little.

The conventional solar cell back board structure mainly is the fluoro-containing copolymer film (Tedlar) that the upper and lower surperficial applying E.I.Du Pont Company at the polyethylene terephthalate layer sells.In No. 201041150 Taiwan patent; Disclosed a kind of solar cell backboard structure of improvement; As shown in Figure 2; Said solar cell backboard structure comprise conductor watertight composition 24, respectively be formed at said conductor watertight composition 24 upper and lower surfaces second insulating barrier 26 and first insulating barrier 22, be formed at the weathering layer 28 on said second insulating barrier 26 and be formed at the primer layer 20 on said first insulating barrier 22, said Taiwan patent is that second insulating barrier 26 of polyethylene terephthalate solves the problems that pin hole runs through and electric arc runs through with weathering layer 28 by material.Yet, still not enough as weathering layer 48 in effect aspect weatherability, anti-UV property and the anti-aqueous vapor with polyethylene terephthalate.

Therefore, still need a kind of solar cell backboard structure with excellent anti-aqueous vapor effect.

The utility model content

In order to overcome above-mentioned defective, the utility model provides a kind of solar cell backboard structure, and said solar cell backboard structure has excellent anti-aqueous vapor effect and weatherability or anti-processability.

The utility model for the technical scheme that solves its technical problem and adopt is:

A kind of solar cell backboard structure; Be provided with core layer, first adhesion agent layer, second adhesion agent layer, internal coated layer and outer covering layer; Said internal coated layer and said outer covering layer are all the composite membrane of being processed by polyimides and Teflon; Said core layer has relative upper and lower surface, and said internal coated layer adheres to said core layer upper surface through first adhesion agent layer, and said outer covering layer adheres to said core layer lower surface through second adhesion agent layer.

The further technical scheme of the utility model is:

The said composite membrane of processing by polyimides and Teflon can be by polyimide film and Teflon film fit the institute constitute, the Teflon film of said internal coated layer is positioned at the polyimide film upper surface, the Teflon film of said outer covering layer is positioned at the polyimide film lower surface.The thickness of said polyimide film and Teflon film is all 12 to 50 microns.

The said composite membrane of being processed by polyimides and Teflon also can be the co-extruded films of polyimides and Teflon.

Said core layer is a polymer material layer, preferably the polyethylene terephthalate layer.

The thickness of said core layer is 75 to 275 microns.

The thickness of said internal coated layer is 24 to 100 microns.

The thickness of said outer covering layer is 24 to 100 microns.

Preferably said internal coated layer is identical with said outer covering layer thickness.

The beneficial effect of the utility model is: the composite membrane that the utility model utilization is processed by polyimides and Teflon is as outer covering layer; With effective obstruct aqueous vapor; And will be positioned at the inboard as internal coated layer by the composite membrane that polyimides and Teflon are processed and be attached at solar cell or solar module on; With further lifting moisture obstruction; In addition, the composite membrane of being processed by polyimides and Teflon also has weather resistance, so the solar cell backboard structure of the utility model has excellent anti-aqueous vapor effect and weatherability or anti-processability.

Description of drawings

Figure 1A and Figure 1B are the solar cell backboard structural representation of the utility model, and wherein, Figure 1B constitutes for being fitted by polyimide film and Teflon film for internal coated layer and outer covering layer are described;

Fig. 2 is the solar cell backboard structure of No. 201041150 Taiwan patent;

Description of reference numerals

10 core layers

10a core layer upper surface

10b core layer lower surface

11a first adhesion agent layer

11b second adhesion agent layer

12 internal coated layers

The 12a polyimide film

12b Teflon film

13 outer covering layers

The 13a polyimide film

13b Teflon film

20 primer layers

22 first insulating barriers

24 conductor watertight compositions

26 second insulating barriers

28 weathering layers.

The specific embodiment

Embodiment: a kind of solar cell backboard structure; Shown in Figure 1A and Figure 1B; Have core layer 10, the first adhesion agent layer 11a, the second adhesion agent layer 11b, internal coated layer 12 and outer covering layer 13; Said internal coated layer 12 is all the composite membrane of being processed by polyimides and Teflon with said outer covering layer 13; Said core layer 10 has relative upper and lower surperficial 10a, 10b, and said internal coated layer 12 adheres to said core layer upper surface 10a through the first adhesion agent layer 11a, and said outer covering layer 13 adheres to said core layer lower surface 10b through the second adhesion agent layer 11b.

It is following that the solar cell backboard structure of the utility model prepares process: mainly be that preparation one material for example is that polyethylene terephthalate and thickness are 75 to 275 microns core layer 10; Above that, respectively do for oneself 24 to 100 microns internal coated layer 12 and outer covering layer 13 of lower surface 10a, the 10b first adhesion agent layer 11a and the second adhesion agent layer 11b bond thickness through material such as epoxy resin, can obtain the solar cell backboard structure of the utility model.Preferably the thickness of internal coated layer and outer covering layer is identical, to keep the very property of solar cell backboard structure.

The first adhesion agent layer 11a and the second adhesion agent layer 11b of the utility model can be black or white person, for example contain additives such as carbon black titanium dioxide or pigment.

Present embodiment is stressed that; Internal coated layer 12 and the composite membrane of outer covering layer 13 for processing by polyimides and Teflon; The co-extruded films of polyimides and Teflon for example, perhaps shown in Figure 1B, outer covering layer 13 is made up of thickness 12 to 30 polyimide film 13a and the Teflon film 13b institute that fits of respectively doing for oneself; Internal coated layer 12 is made up of thickness 12 microns to 50 microns polyimide film 12a and the Teflon film 12b institute that fits of respectively doing for oneself; When using the composite membrane of processing by polyimides and Teflon, can be by the adhesion strength of polyimides lifting, for example with adhesion agent layer; Adhesion strength between the first adhesion agent layer 11a and the internal coated layer 12, and the adhesion strength between the second adhesion agent layer 11b and the outer covering layer 13.

The described Teflon of the utility model; Be meant fluorine-containing polymer, for example, polyvinyl fluoride (Polyvinyl fluoride; PVF), Kynoar (Polyvinylidene fluoride; PVDF), polytrifluorochloroethylene (Polychlorotrifluorethylene, PCTFE), polytetrafluoroethylene (PTFE) (polytetrafluorethylene, PTFE) or the copolymer of tetrafluoroethene and ethene (ETFE); And be good with the copolymer of polytetrafluoroethylene (PTFE) and tetrafluoroethene and ethene, promote moisture obstruction with this.

First adhesion agent layer in the utility model and the thickness of second adhesion agent layer are respectively done for oneself 10 to 50 microns.

Test case: according to ASTM F-1249, carry out the test of aqueous vapor penetrance, and the result is embedded in table 1.

Polyethylene terephthalate (PET): adopt Xinguang Synthetic Fibre Co. Ltd.'s polyester film, G281

Epoxy resin: adopt the epoxy resin of Asia electricity material preparation, AEM-V1

Polyimides (PI): SKC Kolon, FEP

Polytetrafluoroethylene (PTFE): Dupont Kapton, FN PI film

Table 1:

The aqueous vapor penetrance of conventional solar cell backboard is general big about 1.8g/m ²More than-the sky, the solar cell backboard structure of the utility model can reduce the aqueous vapor penetrance significantly to 1.1g/m ²-day, have excellent anti-aqueous vapor effect.

The material core is an aluminium sheet in No. 201041150 Taiwan patent, but skin is the PET material, through environmental change; Weather does not change, and does not have anti-UV property, does not have effects such as waterproof and choke; Compared to this, the utility model uses the composite membrane weatherability that contains Teflon very good, and the anti-UV characteristic of tool; Very good to the atmosphere choke effect that blocks water, can long-term storage in atmospheric environment, can not produce cracking and change.

Claims

1. solar cell backboard structure; It is characterized in that: be provided with core layer, first adhesion agent layer, second adhesion agent layer, internal coated layer and outer covering layer; Said internal coated layer and said outer covering layer are all the composite membrane of being processed by polyimides and Teflon; Said core layer has relative upper and lower surface, and said internal coated layer adheres to said core layer upper surface through first adhesion agent layer, and said outer covering layer adheres to said core layer lower surface through second adhesion agent layer.

2. solar cell backboard structure according to claim 1; It is characterized in that; The said composite membrane of processing by polyimides and Teflon be by polyimide film and Teflon film fit the institute constitute; The Teflon film of said internal coated layer is positioned at the polyimide film upper surface, and the Teflon film of said outer covering layer is positioned at the polyimide film lower surface.

3. solar cell backboard structure according to claim 1 is characterized in that, the said composite membrane of being processed by polyimides and Teflon is the co-extruded films of polyimides and Teflon.

4. solar cell backboard structure according to claim 1 is characterized in that, said core layer is a polymer material layer.

5. solar cell backboard structure according to claim 4 is characterized in that, said core layer is the polyethylene terephthalate layer.

6. solar cell backboard structure according to claim 2 is characterized in that, the thickness of said polyimide film and Teflon film is all 12 to 50 microns.

7. solar cell backboard structure according to claim 1 is characterized in that, the thickness of said core layer is 75 to 275 microns.

8. solar cell backboard structure according to claim 1 is characterized in that, the thickness of said internal coated layer is 24 to 100 microns.

9. solar cell backboard structure according to claim 1 is characterized in that, the thickness of said outer covering layer is 24 to 100 microns.

10. solar cell backboard structure according to claim 1 is characterized in that, said internal coated layer is identical with said outer covering layer thickness.